This is not a JG, John Guest Speedfit fitting but is compatible. Need it in a hurry?. Fits 5/16 or 8mm MDP or Eva hose. See other listimg for single fittings.
Non Return Valve One Way 5/16 8mm Push Fit Compatible - JG John Guest speed fit
Non Return Valve One Way 1/4 6.35mm Push Fit Compatible JG John Guest speed fit
Corny Keg Gas Ball Lock Disconnect - Non-Return Check Valve - JG 3/8" Push-Fit
4" Cap with S30 Valve for Homebrew King Keg Pressure Barrel (Non Piercing Pin)
2" Pressure Barrel Cap With S30 Valve (Non Piercing Pin) For Homebrew Beer Kegs
S30 Co2 Pressure Top Up Valve (Non Piercing Pin Type) For Beer Barrel